Democratic presidential candidate former Secretary of State Hillary Clinton speaks during a round table discussion at Holden Heights Community Center on July 22, in Orlando, Fla. With three days to go until the Democratic National Convention, Hillary Clinton is campaigning in Florida.  (Justin Sullivan | Getty Images)

Hillary Clinton asked American voters to make sure that her rival Donald Trump would never set his foot in the Oval Office of the White House, July 20, hours after the controversial billionaire was endorsed by the Republican party to be its presidential nominee. – @Siliconeer #Siliconeer #HillaryClinton #DonaldTrump #Trump #Hillary #AmericaVotes #USPresidentialElections2016

“Donald Trump just became the Republican nominee. Chip in now to make sure he never steps foot in the Oval Office,” Clinton, the Democratic party’s presumptive presidential candidate tweeted soon after the 70-year-old real estate mogul’s nomination at the Republican National Convention in Cleavland, Ohio.

“If Donald Trump wants to make America great again, he should start by actually making things in America,” she said.

The focus of the convention on the second day was supposed to be on the economy, but it was Clinton, the former secretary of state, who was in the spotlight.

New Jersey Governor Chris Christie, shaking off the disappointment of being passed over as Trump’s running mate, led the coordinated attack on Clinton at the Quicken Loans Arena in Cleavland.

He performed a show trial of 68-year-old Clinton, whipping the crowd into frenzied chants of “Lock her Up! Lock her up!”

Christie, one of Trump’s closest allies and a former federal prosecutor, said that Clinton’s policies while secretary of state had helped an al Qaeda-affiliated terror group abduct 300 young schoolgirls in Nigeria and accused her of abetting President Bashar al-Assad in Syria, enabling Iran and Cuba’s Castro brothers along with lying to Americans about her private email server.

“Is she guilty or not guilty?” Christie asked after every charge he laid before the crowd.

The delegates responded with a resounding: “Guilty!”

“We don’t disqualify Hillary Clinton to be the president of the United States,” Christie said. “The facts of her life and career disqualify her.”

Clinton’s campaign quickly reacted to Christie’s speech.

“If you think Chris Christie can lecture anyone on ethics, we have a bridge to sell you,” the campaign said on her Twitter account, a reference to the 2013 George Washington Bridge line closure scandal that badly damaged Christie’s own political brand.

Michael Mukasey, a former attorney general under former president George W. Bush, was also roped in to attack Clinton.

He said Clinton lied about her motivations in setting up a private email server while secretary of state and said that disqualified her from being U.S. President.

“Hillary Clinton is asking the people of this country and the people of the United States to make her the first President in history to take the oath of office after already having violated it,” he said.

The message, Mukasey said, the convention should send to her should be “loud, clear and short: No way, Hillary. No way on earth.”

Meanwhile, Democrats will gather for their convention in Philadelphia from July 25 to 28 to nominate Clinton, as their candidate for the presidency ahead of the November 8 polls.